Gotowe bibliografie tematyczne / TCNZ

Gotowa bibliografia na temat „TCNZ”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 20 lutego 2023

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Artykuły w czasopismach na temat "TCNZ"

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Wolfram, Benedikt, Çağla Baş, Christian Kleeberg i Martin Bröring. "Interaction of manganese corroles with TCNQ and related acceptor molecules". Journal of Porphyrins and Phthalocyanines 24, nr 05n07 (maj 2020): 705–11. http://dx.doi.org/10.1142/s1088424619501359.

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Manganese corroles with the Mn atom in the oxidation states +III and +IV have been probed as donor moieties for supramolecular stacked donor–acceptor complexes with the typical acceptor units TCNQ (tetracyanoquinone), TCNP (tetracyanopyrazine), and TCNB (tetracyanobenzene). Four new compounds formed as single crystals from different co-crystallization attempts. In those cases where a Mn(III) corrole was used as the donor component, hydrolyzed and/or oxygenated compounds [(cor)Mn(TCNQ*)] and [(cor*)Mn(TCNP*)] were obtained as the exclusive products. With chloridomanganese(IV) corroles, sandwich-like 2:1 complexes [(cor)MnCl][Formula: see text][TCNQ] and [(cor)MnCl][Formula: see text][TCNB] form, with both components left intact. Crystallographic analyses reveal partial or complete charge transfer to unusual axial ligands and thus prove the high reactivity of Mn(III) corroles in the first two cases. For the sandwich arrangements, almost-unaltered geometric parameters of the Mn(IV) corroles are observed, pointing to negligible structural consequences for metal corroles when engaged in stacking interactions.
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Maity, Amarendra N., Brigitte Schwederski, Biprajit Sarkar, Stanislav Záliš, Jan Fiedler, Sanjib Kar, Goutam K. Lahiri i in. "Tetranuclear Complexes of [Fe(CO)2(C5H5)]+with TCNX Ligands (TCNX = TCNE, TCNQ, TCNB): Intramolecular Electron Transfer Alternatives in Compounds (μ4-TCNX)[MLn]4". Inorganic Chemistry 46, nr 18 (wrzesień 2007): 7312–20. http://dx.doi.org/10.1021/ic062253k.

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Waldhör, Eberhard, Wolfgang Kaim, Max Lawson i Jeanne Jordanov. "Paramagnetism of Tetranuclear Complexes between TCNX Ligands (TCNE, TCNQ, TCNB) and Four Pentaammineruthenium or Dicarbonyl(pentamethylcyclopentadienyl)manganese Fragments". Inorganic Chemistry 36, nr 15 (lipiec 1997): 3248–52. http://dx.doi.org/10.1021/ic960998s.

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Gurney, Jason K., James Stanley, Katherine McGlynn, Lorenzo Richiardi, Caroline Shaw, Richard Edwards, Tony R. Merriman i in. "Testicular Cancer in New Zealand (TCNZ) study: protocol for a national case–control study". BMJ Open 8, nr 8 (sierpień 2018): e025212. http://dx.doi.org/10.1136/bmjopen-2018-025212.

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Testicular cancer (TC) is by far the most common cancer to affect young men; however, the exposures that cause this disease are still poorly understood. Our own research has shown that Māori men have the highest rates of this disease in New Zealand—a puzzling observation, since internationally TC is most commonly a disease of men of European ancestry. These trends provide us with a unique opportunity: to learn more about the currently unknown exposures that cause TC, and to explain why Māori have the highest rates of this disease in New Zealand. Using epidemiology and genetics, our experienced research team will conduct a nationwide study which aims to answer these internationally important questions.Aim of studyThe overall aim of the current national case–control study is to identify the key exposures in the development of TC in New Zealand, and explore which factors might explain the difference in the incidence of TC between Māori and non-Māori.Methods and analysisOutside of our own investigations into cryptorchidism, we still do not know which exposures are driving the significant incidence disparity between ethnic groups in NZ. The aim of the proposed research is to use a population-based case–control study to identify the key exposures in the development of TC in New Zealand. We will recruit 410 TC cases and 410 controls, and collect (1) environmental exposure data, via interview and (2) genetic information, via genome-wide genotyping.Ethics and disseminationEthical approval for this study was sought and received from the New Zealand Ministry of Health’s Health and Disability Ethics Committee (reference # 17/NTA/248). Following a careful data interpretation process, we will disseminate the findings of this study to a wide and varied audience ranging from general academia, community groups and clinical settings, as well as to the participants themselves.
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Berger, Sascha, Heiko Hartmann, Matthias Wanner, Jan Fiedler i Wolfgang Kaim. "Tetranuclear complexes {(μ4-TCNX)[Cu(Me3TACN)]4}(BF4)4 with TCNX=TCNE, TCNQ or TCNB (1,2,4,5-tetracyanobenzene) and Me3TACN=1,4,7-trimethyl-1,4,7-triazacyclononane". Inorganica Chimica Acta 314, nr 1-2 (marzec 2001): 22–26. http://dx.doi.org/10.1016/s0020-1693(00)00368-6.

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Xu Hong-Bin i Wang Yuan-Xu. "First-principles study of low-compressibility of transition-metal Tc and its nitrides TcN,TcN2,TcN3 and TcN4". Acta Physica Sinica 58, nr 8 (2009): 5645. http://dx.doi.org/10.7498/aps.58.5645.

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Hartmann, Heiko, Wolfgang Kaim, Matthias Wanner, Axel Klein, Stéphanie Frantz, Carole Duboc-Toia, Jan Fiedler i Stanislav Záliš. "Proof of Innocence for the Quintessential Noninnocent Ligand TCNQ in Its Tetranuclear Complex with Four [fac-Re(CO)3(bpy)]+Groups: Unusually Different Reactivity of the TCNX Ligands (TCNX = TCNE, TCNQ, TCNB)‖". Inorganic Chemistry 42, nr 22 (listopad 2003): 7018–25. http://dx.doi.org/10.1021/ic034232l.

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Krishna, Marothu Vamsi, i Dannana Gowri Sankar. "Utility of σ and π-Acceptors for the Spectrophotometric Determination of Gemifloxacin Mesylate in Pharmaceutical Formulations". E-Journal of Chemistry 5, nr 3 (2008): 493–98. http://dx.doi.org/10.1155/2008/801545.

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In this study, four simple, fast, accurate and sensitive spectrophotometric methods have been developed for the determination of gemifloxacin mesylate in pharmaceutical formulations. The methods are based on the charge transfer complexation reaction of the drug as n-electron donor with sigma (σ)-acceptor iodine, and thepi(π)-acceptors 2, 3-dichloro-5, 6-dicyano-p-benzoquinone (DDQ)-7,7,8,8-tetra cyanoquinodimethane (TCNQ) and tetracyanoethylene (TCNE). The obtained charge transfer complexes were measured at 290nm for iodine (in 1, 2-dichloro ethane), at 470, 840 and 420 nm for DDQ, TCNQ and TCNE (in acetonitrile), respectively. Optimization of different experimental conditions is described. Beer's law is obeyed in the concentration range of 6-30, 2-10, 2.5-12.5 and 1-5 μg mL−1for iodine, DDQ, TCNQ and TCNE methods, respectively. The proposed methods were applied successfully to the determination of GFX in pharmaceutical formulations with good accuracy and precision.
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Srinivasa Rao, Pedada, Avinash L. Puyad, Sidhanath V. Bhosale i Sheshanath V. Bhosale. "Triphenylamine-Merocyanine-Based D1-A1-π-A2/A3-D2 Chromophore System: Synthesis, Optoelectronic, and Theoretical Studies". International Journal of Molecular Sciences 20, nr 7 (1.04.2019): 1621. http://dx.doi.org/10.3390/ijms20071621.

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donor–acceptorDonor–acceptor–π–acceptor–donor (D1-A1-π-A2/A3-D2)-type small molecules, such TPA-MC-2 and TPA-MC-3, were designed and synthesized starting from donor-substituted alkynes (TPA-MC-1) via [2 + 2] cycloaddition−retroelectrocyclization reaction with tetracyanoethylene (TCNE) and 7,7,8,8-tetracyanoquinodimethane (TCNQ) units, respectively. TPA-MC-2 and TPA-MC-3 chromophores differ on the A2/A3 acceptor subunit, which is 1,1,4,4-tetracyanobutadiene (TCBD) and a dicyanoquinodicyanomethane (DCQDCM), respectively. Both the derivative bearing same donors D1 (triphenylamine) and D2 (trimethylindolinm) and also same A1 (monocyano) as an acceptor, tetracyano with an aryl rings as the π-bridging moiety. The incorporation of TCNE and TCNQ as strong electron withdrawing units led to strong intramolecular charge-transfer (ICT) interactions, resulting in lower LUMO energy levels. Comparative UV–Vis absorption, fluorescence emission, and electrochemical and computational studies were performed to understand the effects of the TCNE and TCNQ subunits incorporated on TPA-MC-2 and TPA-MC-3, respectively.
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Yun, Sungryul, Seongcheol Mun, Seung Koo Park, Inwook Hwang i Meejeong Choi. "A Thermo–Mechanically Robust Compliant Electrode Based on Surface Modification of Twisted and Coiled Nylon–6 Fiber for Artificial Muscle with Highly Durable Contractile Stroke". Polymers 14, nr 17 (31.08.2022): 3601. http://dx.doi.org/10.3390/polym14173601.

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In this paper, we propose a novel and facile methodology to chemically construct a thin and highly compliant metallic electrode onto a twisted and coiled nylon–6 fiber (TCN) with a three–dimensional structure via surface modification of the TCN eliciting gold–sulfur (Au–S) interaction for enabling durable electro–thermally–induced actuation performance of a TCN actuator (TCNA). The surface of the TCN exposed to UV/Ozone plasma was modified to (3–mercaptopropyl)trimethoxysilane (MPTMS) molecules with thiol groups through a hydrolysis–condensation reaction. Thanks to the surface modification inducing strong interaction between gold and sulfur as a formation of covalent bonds, the Au electrode on the MPTMS–TCN exhibited excellent mechanical robustness against adhesion test, simultaneously could allow overall surface of the TCN to be evenly heated without any significant physical damages during repetitive electro–thermal heating tests. Unlike the TCNAs with physically coated metallic electrode, the TCNA with the Au electrode established on the MPTMS–TCN could produce a large and repeatable contractile strain over 12% as lifting a load of 100 g even during 2000 cyclic actuations. Demonstration of the durable electrode for the TCNA can lead to technical advances in artificial muscles for human–assistive devices as well as soft robots those requires long–term stability in operation.
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Rozprawy doktorskie na temat "TCNZ"

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Ross, Peter, i n/a. "Organisational and Workforce Restructuring in a Deregulated Environment: A Comparative Study of The Telecom Corporation of New Zealand (TCNZ) and Telstra". Griffith University. Graduate School of Management, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030930.155125.

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In the late 1980s, governments in New Zealand and Australia began to deregulate their telecommunications markets. This process included the corporatisation and privatisation of former state owned telecommunications monopolies and the introduction of competition. The Telecom Corporation of New Zealand (TCNZ) was corporatised in 1987 and privatised in 1990. Its Australian counterpart, Telstra, was corporatised in 1989 and partially privatised in 1997. This thesis examines and compares TCNZ and Telstra's changing organisational and workforce restructuring strategies, as they responded to these changes. It further examines how these strategies influenced the firms' employment relations (ER) policies. Strategic human resource management (SHRM) and transaction costs economics (TCE) theories assist in this analyse. TCE links organisational restructuring to the make/buy decisions of firms and the asset-specificity of their employees. It suggests that firms will retain workers that have developed a high degree of firm-specific skills, and outsource more generic and semi-skilled work. Firm strategies are also influenced by national, contextual, factors. From a TCE perspective, these external factors alter relative transaction costs. Hence, different ownership structures, ER legislation and union power help to explain differences in TCNZ and Telstra's organisational restructuring and ER strategies. During the decade from 1990 to 2000, TCNZ and Telstra cut labour costs through large-scale downsizing programs. Job cuts were supported by outsourcing, work intensification and the introduction of new technologies. These initial downsizing programs were carried out through voluntary redundancies, across most sections of the firms. In many instances workers simply self-selected themselves for redundancies. TCNZ and Telstra's downsizing strategies then became more strategic, as they targeted generic and semi-skilled work for outsourcing. These strategies accorded with a TCE analysis. But TCNZ and Telstra engaged in other practices that did not accord with a TCE analysis. For example, both firms outsourced higher skilled technical work. TCNZ and Telstra's continued market domination and the emphasis that modern markets place on short term profits, provided possible reasons for these latter strategies. This thesis suggests, therefore, that while TCE may help to predict broad trends in 'rational organisations', it may be less effective in predicting the behaviour of more politically and ideologically driven organisations aiming for short term profit maximisation. Some TCNZ and Telstra workers were shifted to subsidiaries and strategic alliances, which now assumed responsibility for work that had previously been performed in-house. Many of these external firms re-employed these workers under more 'flexible' employment conditions. TCNZ and Telstra shifted to more unitarist ER strategies with their core workers and reduced union influence in the workplace. Unions at Telstra were relatively more successful in retaining members than their counterparts at TCNZ. By 2002, TCNZ and Telstra had changed from stand-alone public sector organisations, into 'leaner' commercially driven firms, linked to subsidiaries, subcontractors and strategic alliances.
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Ross, Peter. "Organisational and Workforce Restructuring in a Deregulated Environment: A Comparative Study of The Telecom Corporation of New Zealand (TCNZ) and Telstra". Thesis, Griffith University, 2003. http://hdl.handle.net/10072/367438.

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In the late 1980s, governments in New Zealand and Australia began to deregulate their telecommunications markets. This process included the corporatisation and privatisation of former state owned telecommunications monopolies and the introduction of competition. The Telecom Corporation of New Zealand (TCNZ) was corporatised in 1987 and privatised in 1990. Its Australian counterpart, Telstra, was corporatised in 1989 and partially privatised in 1997. This thesis examines and compares TCNZ and Telstra's changing organisational and workforce restructuring strategies, as they responded to these changes. It further examines how these strategies influenced the firms' employment relations (ER) policies. Strategic human resource management (SHRM) and transaction costs economics (TCE) theories assist in this analyse. TCE links organisational restructuring to the make/buy decisions of firms and the asset-specificity of their employees. It suggests that firms will retain workers that have developed a high degree of firm-specific skills, and outsource more generic and semi-skilled work. Firm strategies are also influenced by national, contextual, factors. From a TCE perspective, these external factors alter relative transaction costs. Hence, different ownership structures, ER legislation and union power help to explain differences in TCNZ and Telstra's organisational restructuring and ER strategies. During the decade from 1990 to 2000, TCNZ and Telstra cut labour costs through large-scale downsizing programs. Job cuts were supported by outsourcing, work intensification and the introduction of new technologies. These initial downsizing programs were carried out through voluntary redundancies, across most sections of the firms. In many instances workers simply self-selected themselves for redundancies. TCNZ and Telstra's downsizing strategies then became more strategic, as they targeted generic and semi-skilled work for outsourcing. These strategies accorded with a TCE analysis. But TCNZ and Telstra engaged in other practices that did not accord with a TCE analysis. For example, both firms outsourced higher skilled technical work. TCNZ and Telstra's continued market domination and the emphasis that modern markets place on short term profits, provided possible reasons for these latter strategies. This thesis suggests, therefore, that while TCE may help to predict broad trends in 'rational organisations', it may be less effective in predicting the behaviour of more politically and ideologically driven organisations aiming for short term profit maximisation. Some TCNZ and Telstra workers were shifted to subsidiaries and strategic alliances, which now assumed responsibility for work that had previously been performed in-house. Many of these external firms re-employed these workers under more 'flexible' employment conditions. TCNZ and Telstra shifted to more unitarist ER strategies with their core workers and reduced union influence in the workplace. Unions at Telstra were relatively more successful in retaining members than their counterparts at TCNZ. By 2002, TCNZ and Telstra had changed from stand-alone public sector organisations, into 'leaner' commercially driven firms, linked to subsidiaries, subcontractors and strategic alliances.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Graduate School of Management
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Silva, Maria do Socorro de Paula. "SÃntese e caracterizaÃÃo de complexos bipiridÃnicos de rutÃnio com ligantes polinitrilados". Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1453.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico
No presente trabalho, os complexos cis-[Ru(dcbpy)(bpy)(TCNQ)Cl] e cis-[Ru(dcbpy)(bpy)(TCNE)Cl], denominados de Ru-TCNQ e Ru-TCNE, respectivamente, (dcbpy = 4,4â-dicarboxi-2,2â-bipiridina e bpy = 2,2â-bipirina) foram sintetizados e caracterizados por tÃcnicas espectroscÃpicas e eletroquÃmicas. Os espectros de UV-VisÃvel apresentaram para os complexos Ru-TCNQ e Ru-TCNE bandas de absorÃÃo na regiÃo do visÃvel, sendo atribuÃdas Ãs bandas de transferÃncia de carga do tipo MLCT. Os espectros de luminescÃncia apresentaram emissÃo, quando excitados na regiÃo da MLCT (500nm), evidenciando a modificaÃÃo estrutural com a coordenaÃÃo dos ligantes polinitrilados ao RuII. Os decaimentos dos compostos forma biexponenciais, com o complexo Ru-TCNQ apresentou tempos de vida muito mais curtos que o Ru-TCNE. No infravermelho, foi observado que os compostos TCNX encontram-se ligados covalentemente ao Ãtomo de rutÃnio. Essa coordenaÃÃo se dà atravÃs de ligaÃÃo σ entre o Ãtomo de nitrogÃnio de uma das nitrilas, evidenciada pelo surgimento de um maior nÃmero de bandas referentes ao estiramento C≡N, comparativamente aos ligantes livres de coordenaÃÃo. A observaÃÃo do deslocamento dessas bandas para regiÃes de menor energia, quando comparadas aos ligantes livres, permitiram identificar que os ligantes TCNQ e TCNE encontram-se coordenados em sua forma radicalar (TCNX.â). O grau de transferÃncia de carga (Z) baseado nos espectros de infravermelho para os compostos Ru-TCNQ e Ru-TCNE foi de 0,66 e 0,78, respectivamente. Os espectros de RPE confirmaram a coordenaÃÃo dos ligantes ao centro metÃlico na forma reduzida (Ru-TCNQ: g = 2,007 e para Ru-TCNE: g = 2,010). Os potencias redox nos complexos Ru-TCNQ (Ered = 0,70V vs ENH) e Ru-TCNE (Ered = 1,30V vs ENH) foram deslocados para potenciais mais positivos, quando comparados ao precursor cis-[Ru(dcbpy)(bpy)Cl2] (Ered = 0,67V vs ENH), evidenciando o forte carÃter π receptor de elÃtrons dos ligantes TCNX, estabilizando o centro metÃlico na forma reduzida. Esses resultados evidenciam um carÃter retirador de elÃtrons mais pronunciado para o ligante TCNE em relaÃÃo ao TCNQ.
In this work, the [Ru(bpy)(dcbpy)(TCNQ)Cl] and [Ru(bpy)(dcbpy)(TCNE)Cl] complexes, called Ru-TCNQ and Ru-TCNE, respectively, where bpy = 2,2â- bipyridine and dcbpy = 4,4â-dicarboxy-2,2â-bipyridine, were synthesized and characterized by spectroscopy and electrochemical techniques. The absorption spectra of the Ru-TCNQ and Ru-TCNE complexes showed bands assigned to metalto-ligand charge transfer transitions (MLCT). The luminescence spectra, with excitation at the MLCT, exhibited emission with maximum of intensity at 570 and 605 nm for the Ru-TCNQ and Ru-TCNE complexes, respectively. The luminescence decay of the complexes follows a biexponential law, with the Ru-TCNQ complex showing shorter lifetime than the Ru-TCNE complex. The infrared vibrational spectra of the complexes show a larger number of nitrile stretching bands, comparatively to the free ligands of coordination. These suggesting that the TCNX compounds are coordinated to the ruthenium atom. Upon coordenation, the shifts of these bands for lower energy values are indicative of the TCNX reduced form (TCNX⋅â). These results are confirmed by EPR spectra with g = 2.007 and 2.010 for Ru-TCNQ and Ru-TCNE complexes, respectively. The degree of charge transfer (Z) for the Ru-TCNQ and Ru-TCNE compounds was evaluated as 0.66 and 0.78, respectively. The RuIII/II redox potentials of the Ru-TCNQ (0.70V) and Ru-TCNE (1.30V) compounds, shifted for more positive potentials, when compared to the starting complex, cis- [Ru(dcbpy)(bpy)Cl2] (0,67V). These results inducate that the ligands acts as π-acceptor allowing a π-back-bonding interaction which imply in a thermodynamic stability of the metal in the reduced state (RuII). The data, all together, suggest that the TCNE compound presents a higher πback-bonding interaction capability than TCNQ compound.
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Pontes, Daniel de Lima. "Estudo de complexos de ferro-cyclam com ligantes carboxilados e polinitrilados". Universidade Federal do CearÃ, 2006. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2934.

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CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior
O objetivo deste trabalho à contribuir com o desenvolvimento da quÃmica do sistema Fe-cyclam, atravÃs da sÃntese e caracterizaÃÃo de novos complexos metÃlicos deste sistema com duas classes de ligantes: carboxilados (oxalato e acetato) e ligantes polinitrilados (7,7,8,8 âtetracianoquinodimetano e tetracianoetileno ). AtravÃs da caracterizaÃÃo do complexo cis-[Fe(cyclam)ox]PF6 por infravermelho foi possÃvel identificar que o ligante oxalato encontra-se coordenado ao centro metÃlico de forma bidentada, bem como garantir que o ligante macrocÃclico cyclam continua na esfera de coordenaÃÃo do metal. O potencial formal de meia onda do processo redox Fe3+/2+ do complexo foi observado em â39mV vs Ag/AgCl. O potencial observado encontra-se deslocado 240mV para menores valores em relaÃÃo ao complexo precursor, favorecendo ao estado de oxidaÃÃo Fe3+ do metal, devido ao maior efeito σ doador do ligante oxalato frente aos cloretos. O espectro UV-Vis do complexo cisâ[Fe(cyclam)ox]PF6, em meio aquoso, apresentou trÃs bandas: 229nm, atribuÃda a uma transiÃÃo intraligante do cyclam, 293nm e 357nm, atribuÃdas à transferÃncia de carga de orbitais π do ligante para o orbitais dπ* do metal. Os experimentos fotoquÃmicos demonstraram a grande sensibilidade do complexo à luz, sendo observado a labilizaÃÃo do ligante oxalato da esfera de coordenaÃÃo do metal, e a reatividade da espÃcie formada atravÃs da obtenÃÃo do complexo trans-[Fe(cyclam)acet2]PF6, AtravÃs do estudo de Raio-X, obtido a partir do cristal do complexo trans-[Fe(cyclam)acet2]PF6, foi possÃvel comprovar o modo de coordenaÃÃo das duas molÃculas de acetato na posiÃÃo trans, bem como a identificaÃÃo da disposiÃÃo do cyclam no plano da molÃcula atravÃs de um arranjo conformacional trans-III. Os espectros no infravermelho dos complexos cis - [Fe(cyclam)(TCNX)Cl]Cl, onde TCNX representa os ligantes TCNQ ou TCNE, apresentaram um maior nÃmero de bandas referentes aos estiramentos CN, comparativamente aos ligantes livres, confirmando a alteraÃÃo da simetria do ligante causada pela coordenaÃÃo do metal. Com base nos deslocamentos destas freqÃÃncias para menores valores, comparativamente ao ligante livre, foi possÃvel identificar que os ligantes TCNQ e TCNE estÃo coordenados em sua forma radicalar, estado de oxidaÃÃo â1, sugerindo assim a ocorrÃncia de um processo de transferÃncia de elÃtrons do centro metÃlico, previamente reduzido (Fe2+), para os ligantes TCNX. Os potenciais redox dos Ãtomos de ferro, nos complexos com os ligantes polinitrialados TCNQ (693mV vs ENH) e TCNE (854mV vs ENH), foram deslocados para potenciais mais positivos, comparativamente ao observado no complexo precursor cis-[Fe(cyclam)Cl2]Cl (405mV vs ENH), indicando assim um forte deslocamento de densidade eletrÃnica dπ para os orbitais de simetria π dos ligantes TCNX. Os processos centrados nos ligantes coordenados ficaram mais prÃximos do que nos ligantes livres, indicando uma diminuiÃÃo na barreira de transferÃncia de elÃtrons, que segundos dados da literatura leva a uma melhor conduÃÃo elÃtrica. Os espectros eletrÃnicos dos complexos, em meio aquoso, apresentaram uma banda localizada em baixa energia, atribuÃda a transferÃncias de carga do tipo LMCT dos orbitais pπ das molÃculas de TCNX, para os orbitais dπ* do Ãon Fe3+. No complexo com o ligante TCNQ, esta banda aparece em 764nm e no complexo com o ligante TCNE, em 861nm. Observa-se ainda nos dois complexos a presenÃa das bandas referentes Ãs transiÃÃes LMCT dos cloretos para o Ãon Fe3+ em regiÃes muito prÃximas, em 557 no complexo com TCNE e em 568nm no complexo com TCNQ. A presenÃa desta banda novamente sugere a presenÃa do Ferro no estado oxidado (Fe+3).
The main objective of this work is to contribute with the chemistry of the system Fe-Cyclam through the synthesis and characterization of complexes with carboxylate ligants, acetate and oxalate, and polinitrilate ligands, 7,7,8,8-tetracyanoquinodimethane (TCNQ) and tetracyanoethylene (TCNE). The infrared spectra of the cis-[Fe(cyclam)ox]PF6 complex allowed to identify the coordination of the oxalate ligand to the iron metal in a bidentate mode as well as to suggest the presence of the macrocycle in the coordination sphere of the metal. The redox potential of the complex was observed at â39mV vs Ag/AgCl. The potential is dislocated 240mV for more positive potential when compared to that observed for the precursor complex cis-[Fe(cyclamCl2]Cl. This effect can be attributed to the stronger σ effect of the oxalate ligand when compared to the chlorine. The UV-Vis spectra of the complex, presented three bands: 229nm, attributed to a cyclam intraligand transition and the bands 293nm and 357nm, referring to ligand to metal electronic transfer from π orbitals of the oxalate to dπ* of the metal. The photochemical experiments proved the great sensibility of the complex to the light presence, being observed the reactivity effect of the complex formed after the light exposition by the formation of the trans-[Fe(cyclam)acet2]PF6 complex. Through the Ray-X obtained of the crystal of the trans-[Fe(cyclam)acet2]PF6 complex was possible to identify the coordination of two molecules of acetate at the trans position, as well as to identify the disposition of the cyclam ligand on the plane in a trans-III arrange. The infrared spectrum of the complexes cis - [Fe(cyclam)(TCNX)Cl]Cl, where the TCNX represent the ligands TCNQ and TCNE, present a great number of bands referring to the νCN, when compared with the ligands not coordinated, confirming the symetry changed induced by the metal coordination. Through the wavenumber variation of these bands was possible to identify that the TCNQ and TCNE ligands are coordinated in your radical way, oxidation state â1, suggestion this way the occurrence of a electron transfer from the iron, previously reduced (Fe+2), to the TCNX ligands. The redox potentials of the iron metals in the complexes with the polinitrilate ligands TCNQ (693mV vs ENH) and TCNE (854mV vs ENH) were dislocated for more positive potentials, when compared to the cis-[Fe(cyclam)Cl2]Cl precursor complex (405mV vs ENH), indicating the occurrence of an electronic density transfer to the TCNX molecules. The two potentials of the ligands on the complexes were closer than the ligands not coordinated, this approximation of the potential indicate a decrease of the inner electron transfer. The electronic spectra of the complexes, showed bands in the low energy region, attributed to a charge transfer LMCT, from the TCNX pπ orbital to the metal dπ* orbital. In the cis-[Fe(cyclam)(TCNQ)Cl]Cl complex, the band was observed at 764nm while in the complex with the TCNE ligand this band was observed at 861nm. Also, the complexes presented bands at 557nm (TCNE complex) and 568nm (TCNQ complex)referring to the LMCT transitions from the chlorine atoms to the iron metal reinforcing the assignment of the (Fe+3) oxidation state for the metal center.
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Silva, Maria. "Síntese e caracterização de complexos bipiridínicos de rutênio com ligantes polinitrilados". reponame:Repositório Institucional da UFC, 2007. http://www.repositorio.ufc.br/handle/riufc/2079.

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SILVA, M. S. P. Síntese e caracterização de complexos bipiridínicos de rutênio com ligantes polinitrilados. 2007. 69 f. Dissertação (Mestrado em Química Inorgânica) – Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2007.
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In this work, the [Ru(bpy)(dcbpy)(TCNQ)Cl] and [Ru(bpy)(dcbpy)(TCNE)Cl] complexes, called Ru-TCNQ and Ru-TCNE, respectively, where bpy = 2,2’- bipyridine and dcbpy = 4,4’-dicarboxy-2,2’-bipyridine, were synthesized and characterized by spectroscopy and electrochemical techniques. The absorption spectra of the Ru-TCNQ and Ru-TCNE complexes showed bands assigned to metalto-ligand charge transfer transitions (MLCT). The luminescence spectra, with excitation at the MLCT, exhibited emission with maximum of intensity at 570 and 605 nm for the Ru-TCNQ and Ru-TCNE complexes, respectively. The luminescence decay of the complexes follows a biexponential law, with the Ru-TCNQ complex showing shorter lifetime than the Ru-TCNE complex. The infrared vibrational spectra of the complexes show a larger number of nitrile stretching bands, comparatively to the free ligands of coordination. These suggesting that the TCNX compounds are coordinated to the ruthenium atom. Upon coordenation, the shifts of these bands for lower energy values are indicative of the TCNX reduced form (TCNX⋅–). These results are confirmed by EPR spectra with g = 2.007 and 2.010 for Ru-TCNQ and Ru-TCNE complexes, respectively. The degree of charge transfer (Z) for the Ru-TCNQ and Ru-TCNE compounds was evaluated as 0.66 and 0.78, respectively. The RuIII/II redox potentials of the Ru-TCNQ (0.70V) and Ru-TCNE (1.30V) compounds, shifted for more positive potentials, when compared to the starting complex, cis- [Ru(dcbpy)(bpy)Cl2] (0,67V). These results inducate that the ligands acts as π-acceptor allowing a π-back-bonding interaction which imply in a thermodynamic stability of the metal in the reduced state (RuII). The data, all together, suggest that the TCNE compound presents a higher πback-bonding interaction capability than TCNQ compound.
No presente trabalho, os complexos cis-[Ru(dcbpy)(bpy)(TCNQ)Cl] e cis-[Ru(dcbpy)(bpy)(TCNE)Cl], denominados de Ru-TCNQ e Ru-TCNE, respectivamente, (dcbpy = 4,4’-dicarboxi-2,2’-bipiridina e bpy = 2,2’-bipirina) foram sintetizados e caracterizados por técnicas espectroscópicas e eletroquímicas. Os espectros de UV-Visível apresentaram para os complexos Ru-TCNQ e Ru-TCNE bandas de absorção na região do visível, sendo atribuídas às bandas de transferência de carga do tipo MLCT. Os espectros de luminescência apresentaram emissão, quando excitados na região da MLCT (500nm), evidenciando a modificação estrutural com a coordenação dos ligantes polinitrilados ao RuII. Os decaimentos dos compostos forma biexponenciais, com o complexo Ru-TCNQ apresentou tempos de vida muito mais curtos que o Ru-TCNE. No infravermelho, foi observado que os compostos TCNX encontram-se ligados covalentemente ao átomo de rutênio. Essa coordenação se dá através de ligação σ entre o átomo de nitrogênio de uma das nitrilas, evidenciada pelo surgimento de um maior número de bandas referentes ao estiramento C≡N, comparativamente aos ligantes livres de coordenação. A observação do deslocamento dessas bandas para regiões de menor energia, quando comparadas aos ligantes livres, permitiram identificar que os ligantes TCNQ e TCNE encontram-se coordenados em sua forma radicalar (TCNX.–). O grau de transferência de carga (Z) baseado nos espectros de infravermelho para os compostos Ru-TCNQ e Ru-TCNE foi de 0,66 e 0,78, respectivamente. Os espectros de RPE confirmaram a coordenação dos ligantes ao centro metálico na forma reduzida (Ru-TCNQ: g = 2,007 e para Ru-TCNE: g = 2,010). Os potencias redox nos complexos Ru-TCNQ (Ered = 0,70V vs ENH) e Ru-TCNE (Ered = 1,30V vs ENH) foram deslocados para potenciais mais positivos, quando comparados ao precursor cis-[Ru(dcbpy)(bpy)Cl2] (Ered = 0,67V vs ENH), evidenciando o forte caráter π receptor de elétrons dos ligantes TCNX, estabilizando o centro metálico na forma reduzida. Esses resultados evidenciam um caráter retirador de elétrons mais pronunciado para o ligante TCNE em relação ao TCNQ.
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Monezi, Natália Mariana. "Espectroscopia Raman ressonante e cálculos DFT de sistemas modelo de transferência de carga". Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-24082018-095811/.

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Neste trabalho foram estudados os complexos de transferência de carga resultantes da interação entre as espécies aceptoras de elétrons tetracianoetileno (TCNE) e 7,7,8,8-tetracianoquinodimetano (TCNQ), com aminas mono, bi e tri aromáticas, como espécies doadoras de elétrons, em solução. Também foram estudadas as reações de substituição eletrofílica aromática que ocorre entre o TCNE e aminas. Para tal estudo, foram utilizadas as técnicas espectroscópicas de absorção UV-VIS e Raman, o que permitiu a caracterização dos complexos de transferência de carga, assim como das espécies participantes da reação de tricianovinilação que ocorre entre aminas e TCNE. Para dar suporte aos dados experimentais, cálculos DFT (Teoria do Funcional da Densidade) e TDDFT (Teoria do Funcional da Densidade dependente do tempo) foram realizados, o que permitiu a obtenção das geometrias otimizadas, valores de frequência Raman e energias de transição dessas espécies. Os espectros eletrônicos dos complexos formados entre TCNE e aminas monoaromáticas mostraram que suas energias de transição são proporcionais à capacidade de doação de elétrons da amina. De fato, as energias de transição puderam ser correlacionadas com os valores de potencial de ionização das aminas, apresentando uma correlação linear de acordo com a regra Mulliken. Os espectros Raman permitiram verificar que os modos vibracionais do TCNE envolvidos no processo de transferência de carga apresentam deslocamento para menores números de onda com a diminuição do potencial de ionização da amina, e analogamente, pôde-se obter uma correlação linear entre esses dois parâmetros. No caso das aminas bi e tri aromáticas, a tendência linear entre energia de transição e potencial de ionização foi observada, mas não para os deslocamentos Raman das bandas do TCNE. Na reação de tricianovinilação, os espectros eletrônicos possibilitaram a identificação das espécies participantes da reação, assim como sua caracterização vibracional por espectroscopia Raman ressonante. Através da espectroscopia Raman ressonante, pôde-se, pela primeira vez, caracterizar as espécies intermediárias da reação de tricianovinilação entre TCNE e aminas aromáticas. Os complexos envolvendo TCNQ e aminas monoaromáticas apresentou tendência semelhante à observada em complexos com o TCNE. As energias de transição desses complexos diminuem linearmente, assim como, os modos vibracionais do TCNQ, que apresentam deslocamentos para menores frequências Raman com a diminuição do potencial de ionização da amina. Por outro lado, complexos formados pelo TCNQ e aminas com mais de um anel aromático em sua estrutura, não apresentam correlação entre potencial de ionização do doador e energia de transição e deslocamentos Raman. Os cálculos dos espectros eletrônicos e vibracionais apresentaram boa concordância com os obtidos experimentalmente, porém algumas limitações ficam evidentes na descrição das interações π nesses sistemas modelo.
In this work the charge transfer complexes resulting from the interaction between tetracyanoethylene (TCNE) and 7,7,8,8-tetracyanoquinodimethane (TCNQ), as electron accepting species and mono, bi and tri aromatic amines, as electron donating species, were studied in solution. Also the electrophilic aromatic substitution that occurs between the TCNE and amines has been studied. For this study, the spectroscopic techniques of UV-VIS absorption and Raman were used, which allowed the characterization of the charge transfer complexes, as well as of the species involved in the reaction of tricianovinylation that occurs between amines and TCNE. In order to support the experimental data, DFT (Density Functional Theory) and TDDFT (Time-dependent Density Functional Theory) calculations were performed, to obtain the optimized geometries, Raman frequency values and theoretical transition energies of such species. The electronic spectra of the complexes formed between TCNE and monoaromatic amines showed that their transition energies are proportional to the amine electron donation capacity. In fact it could be linearly correlated with the ionization potential values of the amines, following the Mullikens rule. The Raman spectra allowed to verify that the vibrational modes of the TCNE involved in the process of charge transfer, were displaced to lower wavenumbers with the reduction of the ionization potential of the amine, and analogously, a linear correlation between these two parameters could be obtained. In the case of bi and tri aromatic amines, the linear trend between transition energy and ionization potential was observed, but not for the Raman shifts of the TCNE bands. In the reaction of tricianovinylation, the electronic spectra enabled the identification of the participating species in the reaction, and their vibrational characterization by resonance Raman. Using resonance Raman spectroscopy, it was possible to characterize the intermediate species of the tricianovinylation reaction between TCNE and aromatic amines for the first time. The complexes involving TCNQ and monoaromatic amines showed a similar trend to that observed in complexes with TCNE. The transition energies of these complexes decrease linearly, as well as the vibrational modes of the TCNQ, which present shifts to lower Raman frequencies with the decrease of the ionization potential of the amine. On the other hand, complexes formed by TCNQ and amines with more than one aromatic ring in their structure do not present correlation between donor ionization potential and transition energy and Raman displacements. The calculations of the electronic and vibrational spectra presented good agreement with those obtained experimentally, however some limitations were evidenced in the description of the π interactions in these model systems.
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Decoster, Marc, i E. Guerchais-Jacques. "Contribution à l'étude de la réactivite de polynitriles neutres et anioniques : comportement de TCNQ et TCNE vis-a-vis de complexes du molybdène ; propriétés électrochimiques et complexantes d'anions polycyanocarbones". Brest, 1994. http://www.theses.fr/1994BRES2017.

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Les travaux presentes dans la these ont pour objectif le comportement d'entites polycyanocarbonees vis-a-vis de derives inorganiques et peuvent etre scindes en deux parties. La premiere partie de ce travail traite de l'action d'oxydant doux du type tcnx (x = q, e) sur des complexes mono et dinucleaires du molybdene possedant des ligands dialkyldithiocarbamates rdtc ; r = me, et comme mo(rdtc)#4, mo#2o#3(rdtc)#4 et mo#2(rdtc)#4. Plusieurs composes ont ete synthetises: mo(rdtc)#4(tcnq)#n (n = 1,2) moo(rdtc)#3(tcnq), mo#2o(rdtc)#6(tcnq) et mo#2s(rdtc)#6(tcnq). Nous en avons examine les proprietes en solution (voltammetrie cyclique, rpe) et a l'etat solide (rpe, mesure de susceptibilite magnetique et diffraction des rayons x). On notera en particulier qu'une telle approche indique que les composes du type mo(rdtc)#4(tcnq) r = me et r = et possedent un comportement analogue en solution et un comportement different a l'etat solide. Dans la deuxieme partie de la these l'etude des proprietes redox et complexantes d'anions polycyanocarbones comme (cn)#2c-(cn)c#2n#- (c#1#0n#7)#-, (cn)#2c-(cn)c-n-#2#2#- (c#1#0n#8)#2#-,(cn)#2c#3c#2#- (c#1#0n#6)#2#- est abordee. L'examen des proprietes redox des anions c#1#0n#7#- et c#1#0n#8#2#- a mis en evidence la possibilite de generer les radicaux c#1#0n#7#?#2#-, c#1#0n#8#?#- et la synthese du sel de tetraalkylammonium de ce dernier a ete realisee par voie chimique ; l'etude par diffraction des rayons x du compose obtenu (et#4n)(c#1#0n#8) revele que l'anion existe en realite sous la forme du dimere (c#1#0n#8)#2#2#- et l'etude rpe a l'etat solide a mis en evidence le peuplement de l'etat triplet s = 1. L'etude des proprietes complexantes de ces anions polycyanocarbones a ensuite ete developpee. L'analyse par diffraction des rayons x des derives cu(c#1#0n#6)(h#2o)#2, cu(c#1#0n#6)(en), (en = ethylenediamine) et ag(c#1#0n#7) a montre que ces derniers etaient des polymeres ; l'etude des proprietes magnetiques des composes de cu(ii) a ete examinee
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Kirui, Joseph Kiprono. "ESR study of DMTM(TCNQ)₂". Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29191.

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The ESR g-value and susceptibility measurements for DMTM(TCNQ)₂ have been studied as a function of angle made by crystal with magnetic field and temperature. The angular dependence of g-value is fitted to g² = α+βcos2θ - γsin2θ for three orthogonal directions of crystal rotation. The principal g-values are close to those expected for TCNQ compounds: g₁ = 2.0034, g₂ = 2.0030, g₃ = 2.0024. The susceptibility as a function of temperature agrees with bulk susceptibility measurements except that the maximum position occurs at about 30 K. The results of Oostra et al. for bulk susceptibility showed a maximum at around 50 K. The phase transition reported by Visser et al. at 272 K is observed in the ESR data as a 15% decrease in susceptibility. The linewidth is remarkably anisotropic typical of TCNQ salts. The phase transition study is done for two orientations of the crystal with the magnet field. In one of the orientations the linewidth narrows from 0.15 to 0.11 gauss and in the other it narrows from 0.24 to 0.18 gauss. In the former case there is a growth of a second line due to the twinned stack; transformation twinning takes place at the phase transition. A small level-crossing interaction is inferred from the change in relative intensities of the lines near the crossover.
Science, Faculty of
Physics and Astronomy, Department of
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9

Qureshi, Saleem. "Magnetic properties of TCNQ complexes". Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278000.

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Beales, T. P. "Magnetic susceptibilities of TCNQ complex salts". Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376162.

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Książki na temat "TCNZ"

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Vietnam. Tỏ̂ng cục tiêu chuả̂n đo lường chá̂t lượng., red. Danh mục TCVN và TCN, 1993. [Hà Nội]: Tỏ̂ng cục tiêu chuả̂n đo lường chá̂t lượng, 1993.

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1948-, Adams Kenneth M., i Rourke Byron P. 1939-, red. The TCN guide to professional practice in clinical neuropsychology. Amsterdam: Swets & Zeitlinger, 1992.

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LaMondia, James Arthur. TCN tracker: A decision-based cyst nematode management aid for Connecticut wrapper tobacco types. New Haven: Connecticut Agricultural Experiment Station, 2003.

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LaMondia, James Arthur. TCN tracker: A decision-based cyst nematode management aid for Connecticut wrapper tobacco types. New Haven: Connecticut Agricultural Experiment Station, 2003.

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Lobo, Cecilia Lanza. Mayo y después: La rebelión del Tcnl. Emilio Lanza contra García Meza : los últimos días de la dictadura. La Paz: [s.n.], 1995.

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Graja, Andrzej. Les interactions électron-électron et électron-phonon dans les systèmes unidimensionnels des sels de TCNQ: Nature et conséquences spectrales. Varsovie: Editions scientifiques de Pologne, 1985.

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Adams & Rourke. TCN Guide to Professional Practice I. Garland Science, 1992.

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Adams & Rourke. Tcn Guide to Professional (Hcb) Practice. Garland Science, 1992.

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2022 TCNA Handbook for Ceramic, Glass, and Stone Tile Installation. TCNA, 2022.

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Resnick, Robert, David Halliday i Jearl Walker. Fundamentals of Physics Extended 10E All Access Pack with Gen Physics Lab 5E TCNJ Set. Wiley & Sons, Incorporated, John, 2014.

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Części książek na temat "TCNZ"

1

Giliani, Silvia. "TCN2 Deficiency". W Encyclopedia of Medical Immunology, 632–34. New York, NY: Springer New York, 2020. http://dx.doi.org/10.1007/978-1-4614-8678-7_180.

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Giliani, Silvia. "TCN2 Deficiency". W Encyclopedia of Medical Immunology, 1–3. New York, NY: Springer New York, 2019. http://dx.doi.org/10.1007/978-1-4614-9209-2_180-1.

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Corvaja, C., L. Pasimeni i A. Toffoletti. "Time Resolved EPR Studies of Phenazine-TCNQ and Biphenyl-TCNQ Excited Triplets". W 25th Congress Ampere on Magnetic Resonance and Related Phenomena, 24–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-76072-3_10.

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Barišić, S., i A. Bjeliš. "Equilibrium Properties of TTF-TCNQ". W Theoretical Aspects of Band Structures and Electronic Properties of Pseudo-One-Dimensional Solids, 49–122. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5299-7_2.

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Mahony, Brendan, i Jin Song Dong. "Sensors and actuators in TCOZ". W FM’99 — Formal Methods, 1166–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/3-540-48118-4_12.

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Mahony, Brendan, i Jin Song Dong. "Overview of the Semantics of TCOZ". W IFM’99, 66–85. London: Springer London, 1999. http://dx.doi.org/10.1007/978-1-4471-0851-1_5.

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Dong, Jin Song, Ping Hao, Sheng Chao Qin, Jun Sun i Wang Yi. "Timed Patterns: TCOZ to Timed Automata". W Formal Methods and Software Engineering, 483–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30482-1_39.

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Miller, Tim, i Peter McBurney. "Multi-agent System Specification Using TCOZ". W Multiagent System Technologies, 216–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11550648_20.

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Kagoshima, Seiichi, Hiroshi Nagasawa i Takashi Sambongi. "Properties of TTF-TCNQ and Its Family". W One-Dimensional Conductors, 48–105. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83179-9_3.

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Gropas, Ruby. "Migrant Integration and the Role of the EU". W IMISCOE Research Series, 73–93. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67284-3_4.

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AbstractThis chapter first takes a look at the drivers that led to an EU framework for the integration of legally residing TCNs. It then traces the development of the most important instruments from the Treaty of Amsterdam to the Juncker Commission (2014–2019), which declared migration management and the need for effective migrant integration policies as being among the top political priorities for the EU (Juncker 2014; COM(2015) 240). It examines the Union’s legislative framework in the field of migration, as well as its wider toolbox elaborated to contribute to immigrant integration. The chapter concludes with a discussion of some of the most important challenges that hinder fair and effective integration in the EU.
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Streszczenia konferencji na temat "TCNZ"

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Radulescu, Bogdan Alexandru, Adina Magda Florea i Victorita Radulescu. "TCN Units, Solution in Recognition of Human Activities". W ASME 2021 30th Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/isps2021-65039.

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Abstract Activities and human faces recognition infrastructure are used everywhere behavior analysis is required. Since a video approach is built over an already existing infrastructure comprised of CCTV-Closed Circuit Television and a central computer, it can be used in any space where actions’ monitoring is necessary. Main objective of this paper consists of building a reliable and lightweight human faces and actions’ recognition classifier, able to classify a large number of actions, lightweight enough that it can work in real time. It processes at least 30 frames per second, using of-the-shelf computer hardware, connected to a normal CCTV infrastructure. The temporal convolutional network - TCN represents a viable solution for a proposed problem. It classifies a large number of actions - 60, using only RGB (red-green-blue) images of fairly low resolution, in real time. Deciding which class of action belongs to should not be connected to environment, background, person, view angle, or other specific identifiers. This selection should be associated only with the person executing it and the spatial-temporal context of the person. As technology and processing power improve, the problem slightly shifts. When more processing power to a system is added, in this model is possible either to increase the number of frames per second or the number of cameras in the infrastructure, or to increase the quality of the images, resulting most likely higher accuracy of the predictions. This model can be extended to a larger number of classes, with a minimal impact on performance. The proposed model has a tested accuracy of 82% which can be attributed to the recurrent property of the network. The model performs close to the most performing existing solutions. The present TCN + 3D Convolution Model is built with the smaller TCN units. Its architecture uses an alternation of a Simple Unit and a Complex Unit, in order to maximize the diversity of features the model learns. This paper illustrates a deep learning classifier based on TCNs for human actions recognition. Is relatively lightweight compared to other methods, and performs very well, competing with the best architectures. Ideally, it is able to classify an action irrespective of the person executing it or the environment where it was executed. This is achieved as much as possible through a diverse dataset on which the model is trained and tested, namely NTU RGB+D. After a simple and a complex unit, an Average Pool 3D layer reduces at least one dimension to half.
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Ye Chunuan i Chen Guorong. "Photo emission spectroscopy for Ag-TCNQ (TCNQ = tetracyanoquinodimethane) nanowires". W 8th International Vacuum Electron Sources Conference and Nanocarbon (2010 IVESC). IEEE, 2010. http://dx.doi.org/10.1109/ivesc.2010.5644421.

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Cortinas, R., J. M. Gonzaga, A. R. Green, A. M. Saulenas i B. F. BuSha. "TCNJ Athlete Tracker". W 2015 41st Annual Northeast Biomedical Engineering Conference (NEBEC). IEEE, 2015. http://dx.doi.org/10.1109/nebec.2015.7117126.

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Janssen, P. "EPR in TEA(TCNQ)2 and MEM(TCNQ)2 at FIR frequencies". W 16th International Conference on Infrared and Millimeter Waves. SPIE, 1991. http://dx.doi.org/10.1117/12.2297833.

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Zhou, Fei, Honghai Fan, Baoping Lu, Hongbao Zhang, Infant Raj, Xingang Tao i Kankan Bai. "Application of DNN-TCN Composite Neural Network in Rate of Penetration Prediction". W IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/209886-ms.

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Abstract Rate of Penetration (ROP) prediction is the theoretical core of drilling tool selection and drilling parameter optimization. In recent years, researchers have proposed a variety of ROP prediction models, which can usually be divided into the following two types: traditional empirical and theoretical formula methods, and methods based on data-driven or machine learning techniques. However, the above methods only consider the engineering or formation parameters corresponding to the depth to be drilled, while ignoring the force and motion state of the drilling tool of thousands of meters in the irregular wellbore, which makes it difficult to improve the prediction accuracy of the ROP and can't meet the requirements of drilling parameter control in the era of intelligent drilling. This paper proposes a DNN-TCN composite neural network that can handle both non-sequential features and sequential features. The DNN-TCN model not only considers engineering and geological parameters (non-sequential features: weight on bit, revolutions per minute, gamma ray, etc.), but also considers the force and motion states of drilling tools in the wellbore (sequential features: deviation angle, azimuth angle, dog leg, borehole size, diameter of drilling tool, etc.). The first branch of the DNN-TCN model is DNN, which is used to process non-sequential features; the second branch is TCN, which is used to process sequence features. Using a fully connected neural network to fuse the output layers of branch one and branch two, a new network structure can be obtained—DNN-TCN composite neural network. This paper collects data from 50 wells in a specific field to train and test the model. Root mean squared error (RMSE) and a self-definition indicator which named average accuracy (AA) are adopted to evaluate models performance. The results show that the DNN-TCN composite neural network has higher prediction accuracy than traditional theoretical/empirical models and others machine learning models. In addition, because the DNN-TCN model considers the force and motion state of the drilling tool in the wellbore, the accuracy of the ROP prediction for directional wells is greatly improved, which can't be achieved by other models. That is to say, the DNN-TCN model can have better performance, and the model has good universality. The DNN-TCN model combines the following two capabilities: 1, The powerful nonlinear mapping ability of Deep Neural Networks (DNN) in dealing with high-dimensional complex problems; and 2, The long-term memory ability of Temporal Convolutional Neural Network (TCN) in dealing with sequence problems. The model considers the force and motion state of the drilling tool in the wellbore, and effectively improves the prediction accuracy of the ROP. It is an important basis for drilling tool optimization, drilling parameter design and real-time optimization, and helps to improve the intelligence level and construction efficiency of drilling engineering.
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Qian, Feng, Chengyue Gong, Karishma Sharma i Yan Liu. "Neural User Response Generator: Fake News Detection with Collective User Intelligence". W Twenty-Seventh International Joint Conference on Artificial Intelligence {IJCAI-18}. California: International Joint Conferences on Artificial Intelligence Organization, 2018. http://dx.doi.org/10.24963/ijcai.2018/533.

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Fake news on social media is a major challenge and studies have shown that fake news can propagate exponentially quickly in early stages. Therefore, we focus on early detection of fake news, and consider that only news article text is available at the time of detection, since additional information such as user responses and propagation patterns can be obtained only after the news spreads. However, we find historical user responses to previous articles are available and can be treated as soft semantic labels, that enrich the binary label of an article, by providing insights into why the article must be labeled as fake. We propose a novel Two-Level Convolutional Neural Network with User Response Generator (TCNN-URG) where TCNN captures semantic information from article text by representing it at the sentence and word level, and URG learns a generative model of user response to article text from historical user responses which it can use to generate responses to new articles in order to assist fake news detection. We conduct experiments on one available dataset and a larger dataset collected by ourselves. Experimental results show that TCNN-URG outperforms the baselines based on prior approaches that detect fake news from article text alone.
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Wu, Hai, Qing Li, Chenglu Wen, Xin Li, Xiaoliang Fan i Cheng Wang. "Tracklet Proposal Network for Multi-Object Tracking on Point Clouds". W Thirtieth International Joint Conference on Artificial Intelligence {IJCAI-21}. California: International Joint Conferences on Artificial Intelligence Organization, 2021. http://dx.doi.org/10.24963/ijcai.2021/161.

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This paper proposes the first tracklet proposal network, named PC-TCNN, for Multi-Object Tracking (MOT) on point clouds. Our pipeline first generates tracklet proposals, then refines these tracklets and associates them to generate long trajectories. Specifically, object proposal generation and motion regression are first performed on a point cloud sequence to generate tracklet candidates. Then, spatial-temporal features of each tracklet are exploited and their consistency is used to refine the tracklet proposal. Finally, the refined tracklets across multiple frames are associated to perform MOT on the point cloud sequence. The PC-TCNN significantly improves the MOT performance by introducing the tracklet proposal design. On the KITTI tracking benchmark, it attains an MOTA of 91.75%, outperforming all submitted results on the online leaderboard.
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Janssen, P. "FIR study of TeA(TcNq)2". W 15th International Conference on Infrared and Millimeter Waves. SPIE, 1990. http://dx.doi.org/10.1117/12.2301523.

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Fernandez, David, Jaime Jimenez, Jon Andreu, Carlos Cuadrado i Inigo Kortabarria. "A TCN Gateway Emulator". W 2007 IEEE International Symposium on Industrial Electronics. IEEE, 2007. http://dx.doi.org/10.1109/isie.2007.4375076.

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Kelly, Terri-Ann N., Brendan L. Roach, Charles R. Mackenzie-Smith, Adam B. Nover, Eben G. Estell, Grace D. O’Connell, Gerard A. Ateshian i Clark T. Hung. "Chondroitinase-ABC Digestion and Dynamic Loading Increase Tension-Compression Nonlinearity in Tissue-Engineered Cartilage". W ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14621.

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Native articular cartilage exhibits tension-compression nonlinearity (TCN), where the compressive modulus is lower than its relatively high tensile modulus [1–2]. TCN produces in restricted lateral expansion of the tissue upon axial compression. We previously demnostrated that osmotic swelling can be used to measure the TCN of engineered cartilage by placing the tissue in an initial state of tensile strain. Incremental application of compression can be used to study the tissue’s mechanical properties as it transitions from tension to compression [3]. Although engineered cartilage is able to achieve the Young’s modulus (E Y) and glycosaminoglycan (GAG) content of native tissue, the collagen content and dynamic modulus (G*) consistently underperform the native tissue. Removing GAG with chondroitinase ABC (cABC) has been shown to significantly decrease the tissue properties immediately after digestion but the properties rebound, with improved collagen content and G* compared to undigested controls [4]. Furthermore, we have previously shown that cABC digestion significantly increases TCN in engineered cartilage [3]. Dynamic loading (DL) has been shown to significantly increase the mechanical properties without significantly altering biochemical composition of engineered cartilage, however the mechanism through which DL modulates the mechanical strength of engineered cartilage may be due in part to improved extracellular matrix (ECM) organization [5]. We therefore hypothesize that cABC digestion and DL will improve the tensile properties of engineered cartilage.
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Raporty organizacyjne na temat "TCNZ"

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Li, Shulong, Henry S. White i Michael D. Ward. Scanning Tunneling Microscopy of the Organic Semiconductor ((Eta-C5Me5) 2Ru(1,4-(2(2))-cyclophane)) (TCNQ)4. Fort Belvoir, VA: Defense Technical Information Center, luty 1992. http://dx.doi.org/10.21236/ada246848.

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